Corn-binder cutting mechanism



Sept. 24, 1929. E. TIEDEMANN 1,729,280

' CORN BINDER CUTTING MECHANISM Filed Oct. 51, 1927 2 Sheets-Sheet 1Inventor Sept. 24, 1929. E. TIEDEMANN 1,729,280

CORN BINDER CUTTING MECHANISM Filed Oct. 51, 1927 2 Sheets-Sheet 2Inventor Jfidkflla 7270,

Patented Sept. 24, 1929 UNITED STATES EUGENE rrE'nEMANN, or MIDDLETON,WISCONSIN CORN-BINDER CUTTING MEGHANISIJI- Application filed October 31,1927. Serial No. 230,097.

The present invention relates to a cutting mechanism for corn bindersand has for its prime object to provide a rotary knife to replace thetransverse reciprocating knife now in common use.

Another very important object of the invention resides in the provisionof a cutting mechanism of this nature which includes a pair ofstationary spaced knives which function as guides and a rotary cutter incooperation therewith.

A still further very important object of the invention resides in theprovision of a mecha nism of this nature which is simple in itsconstruction, inexpensive to manufacture, readily assembled with theconventional structure now found in corn binders, thoroughly efficientand reliable in operation, and otherwise well adapted to the purpose forwhich it is designed.

Wit-h the above and numerous other objects in View as will appear as thedescription proceeds, the invention resides in certain novel features ofconstruction, and in the combination and arrangement of parts as will behereinafter more fully described and claimed.

In the drawing:

Figure 1 is a side elevation of the mechanisin embodying the features ofthis inven tion,

Figure 2 is a top plan view thereof,

Figure 3 is a bottom plan view of the rotary cutter,

Figure 4: is an enlarged detail vertical section taken substantially onthe line 4.& of Figure 1, and

Figure 5 is a perspective View of one of the blades.

Referring to the drawing in detail it will be seen that the numeral 5denotes a bracket generally found on corn binders in which is journaledthe drive shaft 6 having a beveled gear 7 thereon meshing with a bevelpin 8 on a shaft 9 also journaled in the bracket 5. The numeral 10denotes a cross bar of the conven tional binder. A bearing sleeve 11 hasjournaled therein the shaft 9 and is provided with an upper bracket arm12 projecting forwardly and a lower bracket arm 13 extending downwardlyand then forwardly. The arm 12 terminates in a bearing 14 and the arm 13terminates in a plate 15 having a bearing 16 vertically alined with thebearing 14. The plate 15 is bolted or otherwise securely fixed to theframe bar 10 as is indicated at 17. The plate 15, arm 13, sleeve 11,bracket 12 with its sleeve 14 forms a substantially U-shaped arm whichis supported on the under side of the frame 10 and the U-shaped arm isso arranged that its entire configuration straddles the rear radius ofthe cutting blades 23. A pin 18 is journaled in the bearings 14 and 16.The hub portion 19 of a beveled gear 20 is keyed to the pin 18 as at 21.This beveled gear 20 has a peripheral annular flange or extension 22 tothe under face of which are fixed a plurality of blades 23, preferablyfour in number. Each blade 23 is provided with a relatively shortarcuate side a and a relatively long arcuate side Z) which is eccentricin respect to the side a and further provided with a relatively longstraight edge 0 and a relatively short straight edge (Z, said straightedges being disposed at right angles to each other. When the blade isassembled on the flange 22 by means of suitable fastening elements 24:the straight edges 0 and (Z radiate from the axis of the pin 18 inabutting relation to the adjacent edges of adjacent blades and, thearcuate edge a is concentric therewith. Therefore a portion of the bladeprojects beyond the periphery of the flange 22 in a substantiallytangential manner that is the arouate edge at is substantiallytangential to the axis of the pin 18.

A stationary knife 25 and a stationary knife 26 are suitably fixed tothe frame 10 to project forwardly therefrom in spaced parallelism in thesame horizontal plane. The inner forward portions of the knives 25and'26 diverge forwardly from each other while the rear portions extendin spaced parallelism. The knife 25 has an opening through which the pin18 extends but the knife 26 is at one side of the pin so that the blades23 pass over the space between the rear portions of the knives 25 and 26as is clearly illustrated in Figure 2, in this figure the blades rotatein a clockwise direction, the arcuate side edges 3) being sharpened. The

inner side edges of the knives 25 and 26 are sharpened the structure ofthe blades being in quadrants having the edges of adjacent blades inabutment provides a gauge for engagement of a broken blade, permitsrepairing of a single broken blade, tends to reduce shearing effect onthe holders 24; and at the same time provide a gently diverting cuttingedge, which efficiently cuts the corn stalks without modification of thecutting knives to grip the stalk while being severed.

As the binder moves forwardly the corn stalks are received between thestationary knives 25 and 26 and guided into the space between the rearportions thereof and the blades 23 in cooperation with the knife 26severs the stalk, as will be quite apparent.

It is thought that the construct-ion, operation, utility and advantagesof this invention will now be quite apparent to those skilled in thisart without more detailed description thereof. The present embodiment ofthe invention has been disclosed in detail merely by way of examplesince in actual practice it attains the features of ad vantageenumerated as desirable in the statement of the invention and the abovedescription. It will be apparent that changes in the details ofconstruction, and in the combination and arrangement of parts as may beresorted to without departing from the spirit or scope of the inventionas hereinafter claimed or sacrificing any of its advantages.

Having thus described my invention, what I claim as new is:

1. In a cutting mechanism for corn binders, a transverse frame bar, asleeve above the bar and to the rear thereof, a shaft journaled throughsaid sleeve, a bracket arm pr0- jecting from the top of the sleeveforwardly and terminating in a bearing with a vertical axis, a bracketarm projecting rearwardly and downwardly from the sleeve and curves toextend forwardly and terminate in a plane having a bearing alined withthe first mentioned bearing, said plate being fixed to the under surfaceof the bar, a pin journaled in said hearing, a beveled gear fixed tosaid pins, a pinion on said shaft meshing with said beveled gear, anannular flange on said gear, a plurality of blades affixed to saidflange, a pair of stationary knives fixed to the frame bar andprojecting forwardly therefrom in a horizontal plane in spacedparallelism, the space between the knives be ing to one side of the pin,each blade being formed with a pair of straight ends disposed at rightangles to each other and one longer than the other, and a pair ofarcuate sides eccentrically disposed to each other and one longer thanthe other, the shortest arcuate side being concentric with the pin sothat the longer arcuate side is disposed substantially tangentiallythrough the pin.

2. In a cutting mechanism for corn binders, a transverse frame bar, asubstantially U-shaped arm extending rearwardly at right angles to saidbar and having the lower end thereof secured to the under side of saidbar, said arm including a pair of sleeves supported thereby, one of saidsleeves positioned adjacent the end of the arm on the upper side thereofand above the plane of said bar for supporting said driving shaft, theother of said sleeves positioned at the end of the upper side of saidarm for supporting one end of a driven shaft, a bearing on the end ofthe lower side of said arm in proximity to the junction with said barfor supporting the other end of the driven shaft.

3. In a cutting mechanism for corn binders, a transverse frame bar, asubstantially U-shaped arm extending rearwardly at right angles to saidbar and having the lower end thereof secured to the underside of saidbar, said arm including a pair of sleeves supported thereby, one of saidsleeves positioned adjacent he end of the arm on the upper side thereofand above the plane of said bar for supporting a driving shaft, saidsleeve 6X- tending obliquely with respect to the plane of said arm, theother of said sleeves positioned at the end of the upper side of saidarm for supporting one end of a driven shaft, said sleeve extendingvertically with respect to said bar, a bearing on the ends of the lowerside of said arm in proximity to the junction with said bar forsupporting the other end of the driven shaft, said bearings beingco-axial with respect to said vertically disposed sleeve.

In testimony whereof I afliX my signature.

EUGENE TIEDEMANN.

